直通式衬胶截止阀、具有结构紧凑、启闭灵活、耐腐蚀性能强，行程短（一般为公称通经1/4）等优点。被广泛应用在石油、化工等管路系统中做截断介质用，但塑料衬里的截止阀严禁用做流量调节，以免节流口处产生的高速介质流冲蚀***密封面。要零部件材料表序号零件名称灰铸铁铸钢不锈耐酸铸钢超低碳不锈耐酸铸钢ZCPRPLRL1阀体/阀盖HT250WCBCF8CF8MCF3CF3M2球体/阀杆252Cr131Cr18Ni91Cr18Ni12Mo2Ti00Cr18Ni1000Cr17Ni14Mo23衬里/阀座PCTEF(F3),FEP(F46),PFA(可溶F4),PP,PO4填料压盖WCBCF8CF8MCF3CF3M5填料PTFE(F4)PTFE(F4)PTFE(F4)6活节螺栓351Cr17Ni21Cr17Ni27阀杆螺母ZCuAl10Fe3ZCuAl10Fe3ZCuAl10Fe38紧固螺栓351Cr17Ni21Cr18Ni9Ti9螺母450Cr18Ni90Cr18Ni910手柄WCBWCBWCB主要外形和连接尺寸公称通经LDD1D2fbZ-φdDN(mm)NPS(inch)PN1.0MPa151/21309565452144-φ14203/415010575552164-φ1425116011585652164-φ143211/4180135100782184-φ184011/2200145110853184-φ185022301601251003204-φ186521/22901801451203204-φ188033101951601353224-φ1810043502151801553228-φ1812554002452101853248-φ1815064802802402103248-φ2320084953352952653268-φ232501062239035032032812-φ233001269844040036842812-φ233501478750046042843016-φ23PN1.6MPa151/21309565452144-φ14203/415010575552164-φ1425116011585652164-φ143211/4180135100782184-φ184011/2200145110853184-φ185022301601251003204-φ186521/22901801451203204-φ188033101951601353228-φ1810043502151801553248-φ1812554002452101853268-φ1815064802802402103288-φ23200849533529526533012-φ232501062240535532033212-φ253001269846041037543412-φ25PN2.5MPa151/21309565452164-φ14203/415010575552164-φ1425116011585652164-φ143211/4180135100782184-φ184011/2200145110853184-φ185022301601251003204-φ186521/22901801451203228-φ188033101951601353228-φ1810043502301901603248-φ2312554002702201883288-φ2515064803002502183308-φ25)